Improvement in oar-locks



@tilted gitarre HENRY HEMPSTEAD, or

GREIENPORT,y NEW YORK.

Letters' Patent No. 93,992, Adated August 24, 1869.

IMPR-O'AVEMENT IN OAR-LOCKS.

The Schedule referred to in these Letters Patent and making part of the same;

To all whom 'it may concern.-

Beit known'that I, HENRY HEMPSTEAD, of Greenport, in the county of Suffolk, (Long Island,) and State of New York, have invented a certain new and-useful Improvement in aYoke Scull-Socket or Oar-Bearing for sculling small boats; and the following is a full, clear, and exact description ofthe same, reference being had tothe accompanyingdrawings, making a part of this specification, in which- .Figure I represents a. face View of my improved segu-hole or oar-bearing, as attached to the stern of a oat.'

Figure 2 shows a sectional end view of the same, Vwith a broken-ofi` section of an oar-resting in against the friction-roller. v Y

Figure 3 shows a perspective view of the stern of a small'boat, with the -yoke scull-socket secured in place for operation. i

The object'of my invention is to prevent the 'chaiing and wearing of the oar, and diminish the friction, so that the oar turns in. the socket withA greater ease, and a greater power' of propulsion is applied, with m'uch less labor and fatigue than when the scull-hole is made in the usual way.

My invention consists in placing friction-rollers in a swinging yoke,'so that the socket in which the oar is placed will oscillate and conform to the position requisite for the oar to take as the boat is being propelled forward, thereby relieving it of all frictinl and wear, and greatly reducing the power and force required ordinar-ily in sculling boats.

To enable others to make and use my improvement,

I will describe it more in detail, referring tothe drawf' ings, and to the letters marked thereon.

In the centre, at the top of the stern A, is fitted the yoke or oar-socket B, loosely, so that it can easily swing inward and change its position.

The oar-socket B, 0r bearing, may be made of cast or wrought-metal, in a properform, as shown in figs. 1 and 3, the lower curved portion making a frame, in which two or more frictionrollers,0 C, are hung on plus or shafts aa, so that they will turn very easily.

The perpheries of the rollers C C are made broad, and rounded ofi' to about the same curve as a ball. or sphere, and project a suiiicient distance up from the socket B to support the oar D 'pmv restingron the metal frame, which is provided, at the top, with j onrnals b b, which are tit-ted into metal boxes EjE, the same being placed and secured, one on each side ofthe opening F, on the top of the stern A, so as to allow the yoke Btc oscillate or be forced inwardvby the action of the oar, as seen in fig. 2, thus relieving the hole F and also the oarf from wear where it. comes in .contact with the boat, and makes the operation of sculling a boat much easier, as there is no perceptible friction in giving the required motion to the oar as it turns resting on the rollers G 0, thus producing an easy ac tion, giving durability and a handsome finish to the stern of a boat.

What I claimas my invention, and desire to secure `by'Letters Patent, is-

The yoke `or oar-socket B, when provided with friction-rollers G C, and arranged so as to oscillate in the manner described, in combination. withv the stern Av of a. boat, substantially in the manner as and for. the purposes herein set forth;

In testimony whereof, I hereunto subscribe my name, y in the presence of- V'Vitnesses:

4Simmer, A. Hawkins,

- J ons G. CBAMBLIN; d

HENRY HEMPSTEAD. 

